midterm prep name: date - wordpress.com · a. 0.025n b. 5.0n c. 200.n d. 80.0n 11. the diagram...

Midterm Prep

Name: Date:

1. Which combination correctly pairs a vectorquantity with its corresponding unit?

A. weight and kg

B. velocity and m/s

C. speed and m/s

D. acceleration and m2/s

2. A 12.0-kilogram cart is moving at a speed of0.25 meter per second. After the speed of the cartis tripled, the inertia of the cart will be

A. unchanged B. one-third as great

C. three times greater D. nine times greater

3. While taking off from an aircraft carrier, a jetstarting from rest accelerates uniformly to a finalspeed of 40. meters per second on a runway thatis 70. meters long. What is the magnitude of theacceleration of the jet?

A. 0.29 m/s2 B. 0.57 m/s2

C. 1.8 m/s2 D. 11 m/s2

4. A 6.0-kilogram cart initially traveling at 4.0 metersper second east accelerates uniformly at 0.50 meterper second squared east for 3.0 seconds. What isthe speed of the cart at the end of this 3.0 secondinterval?

A. 1.5 m/s B. 5.5 m/s

C. 3.0 m/s D. 7.0 m/s

5. A soccer ball is kicked into the air from levelground with an initial speed of 20. meters persecond and returns to ground level. At whichangle above the horizontal should the ball bekicked in order for the ball to travel the greatesttotal horizontal distance? [Neglect friction.]

A. 15 B. 30. C. 45 D. 75

6. Starting from rest, a car travels 18 meters as itaccelerates uniformly for 3.0 seconds. What is themagnitude of the car’s acceleration?

A. 6.0 m/s2 B. 2.0 m/s2

C. 3.0 m/s2 D. 4.0 m/s2

7. A ball is rolling horizontally at 3.00 meters persecond as it leaves the edge of a tabletop 0.750meter above the floor. The ball lands on the floor0.391 second after leaving the tabletop. Whatis the magnitude of the ball’s acceleration 0.200second after it leaves the tabletop? [Neglectfriction.]

A. 1.96 m/s2 B. 7.65 m/s2

C. 9.81 m/s2 D. 15.3 m/s2

8. A projectile with mass m is fired with initialhorizontal velocity vx from height h above levelground. Which change would have resulted in agreater time of flight for the projectile? [Neglectfriction.]

A. decreasing the mass to m/2

B. decreasing the height to h/2

C. increasing the initial horizontal velocity to 2vx

D. increasing the height to 2h

9. A golf club hits a stationary 0.050-kilogram golfball with an average force of 5.0 × 103 newtons,accelerating the ball to a speed of 44 meters persecond. What is the magnitude of the impulseimparted to the ball by the golf club?

A. 2.2 N · s B. 880 N · s

C. 1.1 × 104 N · s D. 2.2 × 105 N · s

page 1

10. A tennis player’s racket applies an average forceof 200. newtons to a tennis ball for 0.025 second.The average force exerted on the racket by thetennis ball is

A. 0.025 N B. 5.0 N

C. 200. N D. 80.0 N

11. The diagram below represents a box sliding downan incline at constant velocity.

Which arrow represents the direction of thefrictional force acting on the box?

A. A B. B C. C D. D

12. Which diagram represents the directions of thevelocity, v, and acceleration, a, of a toy car as itmoves in a clockwise, horizontal, circular path ata constant speed?

A.

B.

C.

D.

13. The magnitude of the gravitational field strengthnear Earth’s surface is represented by

A.Fgm

B. G

C. mg D.Gm1m2

r2

14. What is the magnitude of the gravitational forceof attraction between two 0.425-kilogram soccerballs when the distance between their centers is0.500 meter?

A. 2.41 × 10−11 N B. 4.82 × 10−11 N

C. 5.67 × 10−11 N D. 1.13 × 10−10 N

page 2 Midterm Prep

15. The speed of a car is increased uniformly from11 meters per second to 19 meters per second.The average speed of the car during this interval is

A. 0.0 m/s B. 15 m/s

C. 30. m/s D. 4.0 m/s

16. Base your answer to the following question on theinformation below and on your knowledge ofphysics.

The scaled diagram belowrepresents two forces acting concurrentlyat point P. The magnitude of force Ais 32 newtons and the magnitude offorce B is 20. newtons. The anglebetween the directions of force A andforce B is 120.

Determine the linear scale used in the diagram.

17. Base your answer to the following question onthe information and diagram below and on yourknowledge of physics.

A 150-newton force, applied to awooden crate at an angle of 30. abovethe horizontal, causes the crate to travelat constant velocity across a horizontalwooden floor, as represented below.

Calculate the magnitude of the horizontalcomponent of the 150-newton force. [Show allwork, including the equation and substitution withunits.]

18. Determine the magnitude of the frictional forceacting on the crate.

19. Calculate the magnitude of the normal forceexerted by the floor on the crate. [Show all work,including the equation and substitution with units.]


On a flat, level road, a1500-kilogram car travels around acurve having a constant radius of45 meters. The centripetal accelerationof the car has a constant magnitude of3.2 meters per second squared.

Calculate the car’s speed as it travels around thecurve. [Show all work, including the equation andsubstitution with units.]

21. Determine the magnitude of the centripetal forceacting on the car as it travels around the curve.

22. What force provides the centripetal force neededfor the car to travel around the curve?

23. Describe what happens to the magnitude of thecentripetal force on the car as it travels around thecurve if the speed of the car decreases.

page 3 Midterm Prep

24. A unit used for a vector quantity is

A. watt B. newton

C. kilogram D. second

25. A displacement vector with a magnitude of20. meters could have perpendicular componentswith magnitudes of

A. 10. m and 10. m B. 12 m and 8.0 m

C. 12 m and 16 m D. 16 m and 8.0 m

26. A hiker travels 1.0 kilometer south, turns andtravels 3.0 kilometers west, and then turns andtravels 3.0 kilometers north. What is the totaldistance traveled by the hiker?

A. 3.2 km B. 3.6 km

C. 5.0 km D. 7.0 km

27. A car with an initial velocity of 16.0 metersper second east slows uniformly to 6.0 metersper second east in 4.0 seconds. What is theacceleration of the car during this 4.0-secondinterval?

A. 2.5 m/s2 west B. 2.5 m/s2 east

C. 4.0 m/s2 west D. 4.0 m/s2 east

28. On the surface of planet X, a body with a mass of10. kilograms weighs 40. newtons. The magnitudeof the acceleration due to gravity on the surfaceof planet X is

A. 4.0 × 103 m/s2 B. 4.0 × 102 m/s2

C. 9.8 m/s2 D. 4.0 m/s2

29. A car traveling in a straight line at an initial speedof 8.0 meters per second accelerates uniformly toa speed of 14 meters per second over a distanceof 44 meters. What is the magnitude of theacceleration of the car?

A. 0.41 m/s2 B. 1.5 m/s2

C. 3.0 m/s2 D. 2.2 m/s2

30. An object starts from rest and falls freely for40. meters near the surface of planet P. If the timeof fall is 4.0 seconds, what is the magnitude ofthe acceleration due to gravity on planet P?

A. 0 m/s2 B. 1.3 m/s2

C. 5.0 m/s2 D. 10. m/s2

31. If a block is in equilibrium, the magnitude of theblock’s acceleration is

A. zero

B. decreasing

C. increasing

D. constant, but not zero

32. A 7.0-kilogram cart, A, and a 3.0-kilogram cart, B,are initially held together at rest on a horizontal,frictionless surface. When a compressed springattached to one of the carts is released, the cartsare pushed apart. After the spring is released,the speed of cart B is 6.0 meters per second, asrepresented in the diagram below.

What is the speed of cart A after the spring isreleased?

A. 14 m/s B. 6.0 m/s

C. 3.0 m/s D. 2.6 m/s

page 4 Midterm Prep

33. An electron in a magnetic field travels at constantspeed in the circular path represented in thediagram below.

Which arrow represents the direction of the netforce acting on the electron when the electron isat position A?

A. B.

C. D.

34. The data table below lists the mass and speed offour different objects.

Object Mass(kg) Speed(m/s)

A 2.0 6.0

B 4.0 5.0

C 6.0 4.0

D 8.0 2.0

Which object has the greatest inertia?

A. A B. B C. C D. D

35. The height of a typical kitchen table isapproximately

A. 10−2 m B. 100 m

C. 101 m D. 102 m

36. A ball is thrown with a velocity of 35 meters persecond at an angle of 30. above the horizontal.Which quantity has a magnitude of zero when theball is at the highest point in its trajectory?

A. the acceleration of the ball

B. the momentum of the ball

C. the horizontal component of the ball’s velocity

D. the vertical component of the ball’s velocity

37. The graph below represents the relationshipbetween velocity and time of travel for a toy carmoving in a straight line.

The shaded area under the line represents the toycar’s

A. displacement B. momentum

C. acceleration D. speed


A cannonball with a mass of1.0 kilogram is fired horizontally from a500.-kilogram cannon, initially at rest, ona horizontal, frictionless surface. Thecannonball is acted on by an average force of8.0 × 103 newtons for 1.0 × 10−1 second.

What is the magnitude of the average net forceacting on the cannon?

A. 1.6 N B. 16 N

C. 8.0 × 103 N D. 4.0 × 106 N

page 5 Midterm Prep

39. A constant eastward horizontal force of70. newtons is applied to a 20.-kilogram cratemoving toward the east on a level floor. If thefrictional force on the crate has a magnitude of10. newtons, what is the magnitude of the crate’sacceleration?

A. 0.50 m/s2 B. 3.5 m/s2

C. 3.0 m/s2 D. 4.0 m/s2

40. The diagram below represents a ball projected horizontally from a cliff at a speed of 10. meters per second. Theball travels the path shown and lands at time t and distance d from the base of the cliff. [Neglect friction.]

A second, identical ball is projected horizontally from the cliff at 20. meters per second. Determine the distancethe second ball lands from the base of the cliff in terms of d.

41. Which quantity is a vector?

A. power B. kinetic energy

C. speed D. weight

42. A 65.0-kilogram astronaut weighs 638 newtons atthe surface of Earth. What is the mass of theastronaut at the surface of the Moon, where theacceleration due to gravity is 1.62 meters persecond squared?

A. 10.7 kg B. 65.0 kg

C. 105 N D. 638 N

43. When the sum of all the forces acting on a blockon an inclined plane is zero, the block

A. must be at rest

B. must be accelerating

C. may be slowing down

D. may be moving at constant speed

44. The greatest increase in the inertia of an objectwould be produced by increasing the

A. mass of the object from 1.0 kg to 2.0 kg

B. net force applied to the object from 1.0 N to2.0 N

C. time that a net force is applied to the objectfrom 1.0 s to 2.0 s

D. speed of the object from 1.0 m/s to 2.0 m/s

page 6 Midterm Prep

45. A 100.-kilogram cart accelerates at 0.50 meterper second squared west as a horse exerts a forceof 60. newtons west on the cart. What is themagnitude of the force that the cart exerts on thehorse?

A. 10. N B. 50. N C. 60. N D. 110 N

46. A blue lab cart is traveling west on a track when itcollides with and sticks to a red lab cart travelingeast. The magnitude of the momentum of the bluecart before the collision is 2.0 kilogram · metersper second, and the magnitude of the momentumof the red cart before the collision is 3.0 kilogrammeters per second. The magnitude of the totalmomentum of the two carts after the collision is

A. 1.0 kg · m/s B. 2.0 kg · m/s

C. 3.0 kg · m/s D. 5.0 kg · m/s

47. The diagram below represents the path of a thrownball through the air.

Which arrow best represents the direction in whichfriction acts on the ball at point P?

A. B.

C. D.

48. Which graph represents the relationship betweenthe speed of a freely falling object and the time offall of the object near Earth’s surface?

A.

B.

C.

D.

49. Which graph represents the motion of an objecttraveling with a positive velocity and a negativeacceleration?

A. B.

C. D.

page 7 Midterm Prep

50. Car A, moving in a straight line at a constantspeed of 20. meters per second, is initially200 meters behind car B, moving in the samestraight line at a constant speed of 15 meters persecond. How far must car A travel from this initialposition before it catches up with car B?

A. 200 m B. 400 m

C. 800 m D. 1000 m

51. A 1000.-kilogram car traveling 20.0 meters persecond east experiences an impulse of 2000.newton · seconds west. What is the final velocityof the car after the impulse has been applied?

A. 18.0 m/s east B. 19.5 m/s east

C. 20.5 m/s west D. 22.0 m/s west


As represented in the diagram below, aconstant 15-newton force, F, is applied to a2.5-kilogram box, accelerating the box to theright at 2.0 meters per second squared acrossa rough horizontal surface.

Determine the magnitude of the force of frictionon the box.


A ball is rolled twice across the samelevel laboratory table and allowed to roll offthe table and strike the floor. In each trial,the time it takes the ball to travel from theedge of the table to the floor is accuratelymeasured. [Neglect friction.]

In trial A, the ball is traveling at 2.50 meters persecond when it reaches the edge of the table. Theball strikes the floor 0.391 second after rolling offthe edge of the table. Calculate the height of thetable.

54. In trial B, the ball is traveling at 5.00 meters persecond when it reaches the edge of the table.Compare the time it took the ball to reach thefloor in trial B to the time it took the ball to reachthe floor in trial A.

page 8 Midterm Prep

Base your answer to the following question on the information and diagram below and on your knowledge of physics.

A toy airplane flies clockwise at a constant speed in a horizontal circle of radius 8.0 meters. The magnitudeof the acceleration of the airplane is 25 meters per second squared. The diagram shows the path of the airplane asit travels around the circle.

page 9 Midterm Prep

55. Calculate the speed of the airplane. 56. State the direction of the velocity of the airplaneat the instant the acceleration of the airplane issouthward.

page 10 Midterm Prep

Base your answer to the following question on the information and diagram below and on your knowledge of physics.

The graph below represents the speed of a marble rolling down a straight incline as a function of time.


57. What quantity is represented by the slope of thegraph?

58. Calculate the distance the marble travels duringthe first 3.0 seconds.

59. The graph below represents the relationshipbetween weight and mass for objects on thesurface of planet X.

Determine the acceleration due to gravity on thesurface of planet X.


A hiker starts at point P andwalks 2.0 kilometers due east and then1.4 kilometers due north. The vectors inthe diagram below represent these twodisplacements.

Using a metric ruler, determine the scale used inthe vector diagram.

61. On the diagram below, use a ruler to constructthe vector representing the hiker’s resultantdisplacement.

62. Determine the magnitude of the hiker’s resultantdisplacement.

63. Using a protractor, determine the angle betweeneast and the hiker’s resultant displacement.

64. A 3.00-kilogram mass is thrown vertically upwardwith an initial speed of 9.80 meters per second.What is the maximum height this object willreach? [Neglect friction.]

A. 1.00 m B. 4.90 m

C. 9.80 m D. 19.6 m

65. An airplane traveling north at 220. meters persecond encounters a 50.0-meters-per-secondcrosswind from west to east, as represented in thediagram below.

What is the resultant speed of the plane?

A. 170. m/s B. 214 m/s

C. 226 m/s D. 270. m/s


66. A 160.-kilogram space vehicle is traveling along astraight line at a constant speed of 800. meters persecond. The magnitude of the net force on thespace vehicle is

A. 0 N B. 1.60 × 102 N

C. 8.00 × 102 N D. 1.28 × 105 N

67. A student throws a 5.0-newton ball straight up.What is the net force on the ball at its maximumheight?

A. 0.0 N B. 5.0 N, up

C. 5.0 N, down D. 9.8 N, down

68. A 1.5-kilogram cart initially moves at 2.0 metersper second. It is brought to rest by a constant netforce in 0.30 second. What is the magnitude ofthe net force?

A. 0.40 N B. 0.90 N

C. 10. N D. 15 N

69. As a 5.0 × 102–newton basketball player jumpsfrom the floor up toward the basket, the magnitudeof the force of her feet on the floor is 1.0 × 103

newtons. As she jumps, the magnitude of theforce of the floor on her feet is

A. 5.0 × 102 N B. 1.0 × 103 N

C. 1.5 × 103 N D. 5.0 × 105 N

70. A 0.0600-kilogram ball traveling at 60.0 metersper second hits a concrete wall. What speed musta 0.0100-kilogram bullet have in order to hit thewall with the same magnitude of momentum asthe ball?

A. 3.60 m/s B. 6.00 m/s

C. 360. m/s D. 600. m/s

71. The Hubble telescope’s orbit is 5.6 × 105 metersabove Earth’s surface. The telescope has a massof 1.1 × 104 kilograms. Earth exerts a gravitationalforce of 9.1 × 104 newtons on the telescope. Themagnitude of Earth’s gravitational field strength atthis location is

A. 1.5 × 10−20 N/kg B. 0.12 N/kg

C. 8.3 N/kg D. 9.8 N/kg

72. Which diagram best represents the position of aball, at equal time intervals, as it falls freely fromrest near Earth’s surface?

A. B. C. D.

73. A different force is applied to each of four differentblocks on a frictionless, horizontal surface. Inwhich diagram does the block have the greatestinertia 2.0 seconds after starting from rest?

A.

B.

C.

D.


74. A car, initially traveling at 15 meters per secondnorth, accelerates to 25 meters per second northin 4.0 seconds. The magnitude of the averageacceleration is

A. 2.5 m/s2 B. 6.3 m/s2

C. 10. m/s2 D. 20. m/s2

75. A car is moving with a constant speed of20. meters per second. What total distance doesthe car travel in 2.0 minutes?

A. 10. m B. 40. m

C. 1200 m D. 2400 m

76. An object is in equilibrium. Which force vectordiagram could represent the force(s) acting on theobject?

A. B.

C. D.


77. Base your answer(s) to the following question(s) on the information and diagram below and on your knowledge ofphysics.

A 1.5 × 103-kilogram car is driven at a constant speed of 12 meters per second counterclockwise arounda horizontal circular track having a radius of 50. meters, as represented below.

Track, as Viewed from Above

On the diagram provided, draw an arrow to indicate the direction of the velocity of the car when it is at theposition shown. Start the arrow on the car.

78. Calculate the magnitude of the centripetal acceleration of the car. [Show all work, including the equation andsubstitution with units.]


79. Base your answer(s) to the following question(s)on the information below and on your knowledgeof physics.

A football is thrown at an angle of30. above the horizontal. The magnitudeof the horizontal component of the ball’sinitial velocity is 13.0 meters per second.The magnitude of the vertical component ofthe ball’s initial velocity is 7.5 meters persecond. [Neglect friction.]

On the axes provided, draw a graph representingthe relationship between the horizontaldisplacement of the football and the time thefootball is in the air.

80. The football is caught at the same height fromwhich it is thrown. Calculate the total time thefootball was in the air. [Show all work, includingthe equation and substitution with units.]


The diagram below represents a4.0-newton force applied to a 0.200-kilogramcopper block sliding to the right on ahorizontal steel table.

Determine the weight of the block.

82. Calculate the magnitude of the force of frictionacting on the moving block. [Show all work,including the equation and substitution with units.]

83. Determine the magnitude of the net force actingon the moving block.

84. Describe what happens to the magnitude of thevelocity of the block as the block slides across thetable.

85. Which quantity is scalar?

A. mass B. force

C. momentum D. acceleration

86. What is the final speed of an object that startsfrom rest and accelerates uniformly at 4.0 metersper second2 over a distance of 8.0 meters?

A. 8.0 m/s B. 16 m/s

C. 32 m/s D. 64 m/s

87. The components of a 15-meters-per-second velocityat an angle of 60. above the horizontal are

A. 7.5 m/s vertical and 13 m/s horizontal

B. 13 m/s vertical and 7.5 m/s horizontal

C. 6.0 m/s vertical and 9.0 m/s horizontal

D. 9.0 m/s vertical and 6.0 m/s horizontal

88. What is the time required for an object startingfrom rest to fall freely 500. meters near Earth’ssurface?

A. 51.0 s B. 25.5 s C. 10.1 s D. 7.14 s

89. A baseball bat exerts a force of magnitude F ona ball. If the mass of the bat is three times themass of the ball, the magnitude of the force of theball on the bat is

A. F B. 2F C. 3F D.F3

90. A 2.0-kilogram mass is located 3.0 meters abovethe surface of Earth. What is the magnitude ofEarth’s gravitational field strength at this location?

A. 4.9 N/kg B. 2.0 N/kg

C. 9.8 N/kg D. 20. N/kg


91. A truck, initially traveling at a speed of 22 metersper second, increases speed at a constant rate of2.4 meters per second2 for 3.2 seconds. What isthe total distance traveled by the truck during this3.2-second time interval?

A. 12 m B. 58 m C. 70. m D. 83 m

92. A 750-newton person stands in an elevator that isaccelerating downward. The upward force of theelevator floor on the person must be

A. equal to 0 N B. less than 750 N

C. equal to 750 N D. greater than 750 N

93. A 3.0-kilogram object is acted upon by an impulsehaving a magnitude of 15 newton · seconds.What is the magnitude of the object’s change inmomentum due to this impulse?

A. 5.0 kg · m/s B. 15 kg · m/s

C. 3.0 kg · m/s D. 45 kg · m/s

94. An air bag is used to safely decrease themomentum of a driver in a car accident. The airbag reduces the magnitude of the force acting onthe driver by

A. increasing the length of time the force actson the driver

B. decreasing the distance over which the forceacts on the driver

C. increasing the rate of acceleration of thedriver

D. decreasing the mass of the driver

95. A body, B, is moving at constant speed in ahorizontal circular path around point P. Whichdiagram shows the direction of the velocity (v) andthe direction of the centripetal force (Fc) acting onthe body?

A.

B.

C.

D.

96. Base your answer(s) to the following question(s) onthe graph below, which represents the relationshipbetween velocity and time for a car moving alonga straight line, and your knowledge of physics.

Determine the magnitude of the average velocityof the car from t = 6.0 seconds to t = 10. seconds.

97. Determine the magnitude of the car’s accelerationduring the first 6.0 seconds.


98. Identify the physical quantity represented by theshaded area on the graph.


Pluto orbits the Sun at an averagedistance of 5.91 × 1012 meters. Pluto’sdiameter is 2.30 × 106 meters and its mass is1.31 × 1022 kilograms.

Charon orbits Pluto with their centersseparated by a distance of 1.96 × 107 meters.Charon has a diameter of 1.21 × 106 metersand a mass of 1.55 × 1021 kilograms.

Calculate the magnitude of the gravitational forceof attraction that Pluto exerts on Charon.

100. Calculate the magnitude of the acceleration ofCharon toward Pluto.

101. State the reason why the magnitude of the Sun’sgravitational force on Pluto is greater than themagnitude of the Sun’s gravitational force onCharon.


A horizontal 20.-newton force is appliedto a 5.0-kilogram box to push it across arough, horizontal floor at a constant velocityof 3.0 meters per second to the right.

Determine the magnitude of the force of frictionacting on the box.

103. Calculate the weight of the box.

104. Calculate the coefficient of kinetic friction betweenthe box and the floor.


Problem-Attic format version 4.4.325c_ 2011–2018 EducAide Software

Licensed for use by [email protected] of Use at www.problem-attic.com

Midterm Prep 12/26/2018

1.Answer: B

2.Answer: A

3.Answer: D

4.Answer: B

5.Answer: C

6.Answer: D

7.Answer: C

8.Answer: D

9.Answer: A

10.Answer: C

11.Answer: D

12.Answer: A

13.Answer: A

14.Answer: B

15.Answer: B

16.Answer: 4.0 N ± 0.2 N

17.Answer: n2 = 1.46

18.Answer: Ephoton = hc

λ

Ephoton=(6.63 × 10−34 J · s)(3.00 × 108 m/s)

4.88 × 10−7 m

19.Answer: Ephoton = 4.08 × 10−19J

20.Answer: R = ρL

A

A = ρLR

A =(5.60 × 10−8 Ω · m)(0.22 m)

19 Ω

21.Answer: A = 6.5 × 10−10 m2

22.Answer: [explanation]

23.

Answer: P =V2

R; P =

(120 V)2

240 Ωor

P = VI; P = (120 V)(0.50 A)

24.Answer: B

25.Answer: C

26.Answer: D

27.Answer: A

28.Answer: D

29.Answer: B

30.Answer: C

31.Answer: A

32.Answer: D

33.Answer: C

34.Answer: D

35.Answer: B

36.Answer: D

Teacher’s Key Page 2

37.Answer: A

38.Answer: D

39.Answer: C

40.Answer: 2d

41.Answer: D

42.Answer: B

43.Answer: D

44.Answer: A

45.Answer: C

46.Answer: A

47.Answer: B

48.Answer: D

49.Answer: B

50.Answer: C

51.Answer: A

52.Answer: Fnet = 10.N

53.Answer: d = 0.750 m

54.Answer: the measured times are the same

55.Answer: v = 14 m/s

56.Answer: the direction of the airplane’s velocity is

east or to the right.

57.Answer: acceleration

58.Answer: d = 6.0 m

59.Answer: 3.0 m/s2 ± 0.25 m/s2

60.Answer: 0.40 km ± 0.02 km

61.Answer:

62.Answer: 2.4 km ± 0.2 km

63.Answer: 35 ± 2

64.Answer: B

65.Answer: C

66.Answer: A

67.Answer: C

68.Answer: C

69.Answer: B

70.Answer: C

71.Answer: C

72.Answer: B

73.Answer: D

74.Answer: A

75.Answer: D

76.Answer: D


77.Answer:

78.

Answer: ac =v2

r

ac =(12 m/s)2

50.mac = 2.9 m/s2 OR 2.8 m/s2

ac =v2

r

ac =(12 m/s)2

50.mac = 2.9 m/s2 OR 2.8 m/s2

79.Answer:

80.

Answer: a =∆ v

t

t =∆ v

t

t =15.0 m/s9.81 m/s2

OR

d = v1t +1

2at2

0 m = (7.5 m/s)t +1

2(−9.8 m/s2)t2

t = 1.5 s

81.Answer: 1.96 N or 2.0 N or 1.9 N

82.Answer: Ff = µ FN

Ff = (0.36)(1.96 N)

Ff = 0.71 N or 0.70 N

83.Answer: 3.3 N

84.Answer: the magnitude of the veolcity increases;

the block speeds up

85.Answer: A

86.Answer: A

87.Answer: B

88.Answer: C

89.Answer: A

90.Answer: C

91.Answer: D

92.Answer: B

93.Answer: B

94.Answer: A

95.Answer: C

96.Answer: 15 m/s

97.Answer: 2.5 m/s2

98.Answer: Example answer: displacement

99.Answer: Fg =

(6.67 × 10−11N · m2/kg2)(1.31 × 1022kg)(1.55 × 1021kg)(1.96 × 107m)2

;

Fg = 3.53 × 1018 N

100.

Answer: Example answer: a =3.53 × 1018 N

1.55 × 1021 kg;

a = 2.28 × 10−3 m/s2


101.Answer: Pluto has a greater mass than Charon.

102.Answer: 20 N

103.Answer: Example answer: W = (5.0 kg)(9.81 m/s2);

Fg = 49 N

104.

Answer: µ =20.N49 N

; µ = 0.41

midterm prep name: date - wordpress.com · a. 0.025n b. 5.0n c. 200.n d. 80.0n 11. the diagram...

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